// arm64:"ASR",-"AND",-"CSEL"
	// ppc64x:"RLDICL",-"ORN",-"ISEL"
	// riscv64:"SRA\t",-"OR",-"SLTIU"
	// s390x:-"RISBGZ",-"AND",-"LOCGR"
	return v >> (s & 63)
}

func lshMask32x64(v int32, s uint64) int32 {
	// arm64:"LSL",-"AND"
	// ppc64x:"ISEL",-"ORN"
	// riscv64:"SLL",-"AND\t",-"SLTIU"
	// s390x:-"RISBGZ",-"AND",-"LOCGR"
	return v << (s & 63)
}